Driving-chain.



C. G. EDEN 6I H. W. ALLINGHAIVI.

DRIVING CHAIN.

APPLICATION FILED IuNe 20. I9I4.

Patented Apr. 25,1916.

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Inventors @messes THB CULUMBIA PLANOIJRAPH p0.. WASI'IING'ION.V D. Cv

UNrrED sCrATEs PATENT oEEroE.

CHRISTOPHER GABRIEL EDEN AND. HENRY I/V. ALLINGHAM, OF MANCHESTER, ENG- LAND, .ASSIGNQRS TO HANS IELENOI'D` LIMITED, OF MANCHESTER, ENG-LAND.

DEIVINGEHAIN.

Specicaton of Letters Patent. Entente@ Apr. 25, 1916.

Application led June 20, 1914. Serial No. 846,284.

To all whom t may concern Be it known that we, CHRISTOPHER GA- BRIEL EDEN and HENRY IVILLIAM ALLING- HAM, both subjects of the King of Great Britain, and residents of Progress Vorks, Brook street, Manchester, in the county of Lancaster, England, have invented certain new and useful Improvements in Driving- Chains, of which the following is a specification.

This invention relates to driving chains of the type usually called silent chains.

The principal objects of the invention are to provide a light chain of inexpensive construction but of increased' strength and durability.

Further objects are to proportion better the extent of the bearing surfaces on the transverse studs in relation to the tensile strength in the web portions thereof, and to facilitate the lubrication of the bearing sur faces.

The invention comprises a modification of that described in the speciication of our patent application, Serial No. 844,970 dated 13th June, 1914, and is illustrated in the accompanying drawings in several examples of construction.

In the drawings: Figure 1 is a plan view, partly in section, of part of a chain made with elements all exactly alike, in which the end-projections stand clear of the bushes. Fig. 2 is a plan view, partly in section, of part of a chain in which the outermost elements of alternate rows consist of half-I links. Fig. 3 is a plan view, partly in section, of part of a chain of the type shown in Fig. 1, but with the end-projections in contact with the bushes. Fig. 4 is a plan view, partly in section, of part of a chain of the type shown in Fig. 2, but with the endprojections in contact with the bushes. Fig. 5 is a side view of a link adapted to gear on one side only. Fig. 6 is a side view of a link adapted to gear on both sides.

In the drawings, a, a, are pairs of half-I the outermost elements of alternate rowsof links consist of half-I links, as shown at c, c, and these may be called single link elements to distinguish them from the double-links. The chain is held together by washers riveted on to the pins or studs, as shown at r.

In Fig. 1, as shown in full lines, the endprojections p, p stand clear of the bushes, but in order that the chain may be stiff to resist whipping, and in order that the stresses may be better. distributed, the edges of the end-projections may be bent, as shown by dotted lines at m, in Fig. 1, or in full lines in Fig. 2, to lie in contacty with the bushes 6, b.

In Figs. 8 and 4. the end-projections p', 29 lie in contact with the bushes o, b along their entire length, as shown. In all the chains the elements are preferably spaced apart by the bushes, as shown at "v, which must be formed in that case suitably to work against the link webs of the adjacent elements. Chains which need to be guided laterally may be guided in any well known or suitable way, for example the washers 1 may serve also as lateral guides.

The links may be of the type adapted to gear on one side only, as shown in Fig. 5, or to gear on both. sides, as shown in Fig. 6. The gear faces are the outer faces of the end-projections p, p, as will be well understood.

Having thus described our invention, what we claim as new` and desire to secure by Letters Patent is 1. The combination in a chain of two link elements and a pivot stud coupling the two link elements, each link element consisting of a pair of links formed with gear faces adjacent to the ends thereof, and with apertures therein near to the ends, and two segmental bushes, one passed through the apertures at one end of the pair of links of one element, and the other bush passed through the apertures at one end of the other links, said bushes serving to position said links, the bushes at adjacent ends of the link elements bearing upon the stud, one bush at one side and the other bush at the other side of said stud, the said bushes having end faces adapted to bear and to work against the adjacent faces of the webs of the link elements.

2. The combination in a chain of a double link element, a single link element, and a pivot stud coupling the said link elements,

the said double link element consisting of a pair of links formed with gear faces adjacent to the ends thereof, and with apertures therein near to the ends, and two segmental bushes, one passed through the apertures at one end of the pair of links, and the other bush passed through the apertures at the other end of the'said pairs of links, said bushes serving to position said links, and the said single link element consisting of a single link formed with gear faces adjacent to the ends thereof and with apertures therein near to the ends, and two segmental bushes, one held in the aperture at one end of the single link, and the other held in the aperture at the other end of the single link, the bushes at adjacent ends of the link elements bearing upon `the stud, one bush at one side and the other bush at the other side of said stud, the said bushes having end faces adapted to bear and to work against the adjacent faces of the webs of the link elements.

3. The combination in a chain of a double link element, a single link element, and a pivot stud coupling the said link elements, the double link element comprising a pair of links with the ends thereof turned out laterally of the webs to form gear faces, and with apertures therein near to the ends, and two segmental bushes, one passed through the apertures at one end of the pair of links, and the other bush passed through the apertures at the other end of the said pair of links, said bushes serving to position said links, and the single link element comprising a single link with the ends thereof turned out laterally of the webs to form gear faces and with apertures therein near to the ends, and two segmental bushes, one held in the aperture at one end of the single link, and the other held in the aperture at the other end of the single link, the bushes at adjacent ends of the link elements bearing upon the stud, one bush at one side and the other bush at the other side of said stud, the said bushes having end faces adapted to bear and to work against the adjacent faces of the webs of the link elements, the laterally extended ends of said links being of such a form as to stand clear of the bushes at the part adjacent to the link webs, but being bent inwardly at the outer ends to bear against the bushes.

In witness whereof, we have hereunto signed our names this 8th day of May, 1914, in the presence of two subscribing witnesses.

CHRISTOPHER GABRIEL EDEN, HENRY W. ALLINGHAM. Witnesses:

/VILLIAM H. VATNEY, CHARLES E. MAYoooK.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

` Washington, D. C. 

